stealc | c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0

General

Target

c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe
Size

2.6MB
MD5

d2517b5725cee32615f55bc10c17e5ef
SHA1

383930e9c4df7894812ce2e5fc641f2481f117a3
SHA256

c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0
SHA512

2e991448715fcf53d972fb0a0bb74a311b06cf91ccbd0b1d74e50eb0a66e8363ee7c76697b967d31677ff4c6c192965529a90ce942e1e275eb7117b91a8a3494
SSDEEP

49152:XQzIzMiqCNw7JtTF+TxMoxc1TU+j+dAzGwlrh:XY5986tIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/1532-2-0x0000000004140000-0x0000000004289000-memory.dmp	family_vidar_v7
behavioral2/memory/2328-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2328-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2328-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2328-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2328-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2328-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2328-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

kat3B53.tmp

pid process

2328 kat3B53.tmp
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

pid	process
2328	kat3B53.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe

description	pid	process	target process
PID 1532 set thread context of 2328	1532	c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe	kat3B53.tmp

Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.

Query Registry
T1012

System Information Discovery
T1082

Processes:

kat3B53.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat3B53.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat3B53.tmp

pid process

2328 kat3B53.tmp
2328 kat3B53.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat3B53.tmp

pid	process
2328	kat3B53.tmp
2328	kat3B53.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe

description	pid	process	target process
PID 1532 wrote to memory of 2328	1532	c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe	kat3B53.tmp
PID 1532 wrote to memory of 2328	1532	c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe	kat3B53.tmp
PID 1532 wrote to memory of 2328	1532	c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe	kat3B53.tmp
PID 1532 wrote to memory of 2328	1532	c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe	kat3B53.tmp
PID 1532 wrote to memory of 2328	1532	c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe	kat3B53.tmp
PID 1532 wrote to memory of 2328	1532	c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe	kat3B53.tmp
PID 1532 wrote to memory of 2328	1532	c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe	kat3B53.tmp
PID 1532 wrote to memory of 2328	1532	c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe	kat3B53.tmp

C:\Users\Admin\AppData\Local\Temp\c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe
"C:\Users\Admin\AppData\Local\Temp\c5390b4c9e15631888d39268d8b0d5b7a39b65959ac00189429c035fdd7106d0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1532

C:\Users\Admin\AppData\Local\Temp\kat3B53.tmp
C:\Users\Admin\AppData\Local\Temp\kat3B53.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:2328

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\kat3B53.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1532-0-0x00000000023F0000-0x00000000023F1000-memory.dmp

Filesize
4KB

Download
memory/1532-2-0x0000000004140000-0x0000000004289000-memory.dmp

Filesize
1.3MB

Download
memory/1532-10-0x0000000000400000-0x000000000069E000-memory.dmp

Filesize
2.6MB

Download
memory/2328-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2328-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2328-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2328-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2328-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2328-19-0x0000000019370000-0x00000000195CF000-memory.dmp

Filesize
2.4MB

Download
memory/2328-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2328-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads